Contents: Removal ↡ Installation ↡
Removal
When working with the fuel supply system, the following rules of cleanliness and safety precautions must be carefully followed:
- No open flames or sparks near the workplace!
- No smoking!
- The workplace must be equipped with a fire extinguisher!
- Ensure good ventilation of the work area. Fuel fumes are toxic.
- The fuel system is under pressure. Opening the system may cause fuel to escape. Collect any leaking fuel with a rag. Wear safety glasses when performing work.
1. Disconnect the ground (-) cable terminal from the negative battery terminal with the ignition off.
Warning! When you disconnect the battery from the radio, the security code is deleted, as well as all automatic settings on the radio station. If the code is unknown or not written down, then the radio can only be put into operation by resorting to the help of a workshop or the manufacturer of the radio. Therefore, make sure in advance that the code is known.
2. Remove the air filter, see the relevant chapter.
(Original published on the website: «MercedesMAN»)
3. Release the fuel injector wires, marking the locations of the clamps so that you can later install them in the same places.
4. Disconnect plugs 1 from injectors 2 by pressing the wire clips (see illustration).
5. Relieve the pressure in the fuel system, see the relevant chapter.
6. Disconnect the supply hose 3 from the distribution line 4 by loosening the fastening clamp and moving the clamp onto the hose (see illustration 4.4).
7. Disconnect the fuel distribution line by unscrewing the two mounting bolts with socket heads and, together with the fuel injectors, separate it from the intake manifold.
8. Remove the retaining clip 5 on the side of the injector and remove the injector from the fuel distribution line (see illustration 4.4).
Installation
9. Put new sealing rings 3 and 4 on injectors 2 and lubricate them with a thin layer of engine oil (see illustration).
10. Install the injectors on the fuel distribution line and secure with clamps 1 (see illustration 4.9).
The clamp is installed so that it is fixed in the rectangular guide on the nozzle (see arrow in illustration 4.9).
11. Connect the fuel distribution line with the injectors secured to the intake manifold and secure it with a force of 15 Nm.
12. Connect the fuel hose to the fuel distribution line and secure it with a clamp.
13. Connect the plugs to the fuel injectors and secure them with clamps. Lay and secure the wires as they were laid before removal.
14. Install the air filter.
15. Connect the ground (-) cable terminal to the negative battery terminal, after making sure the ignition is off.
16. Set up the electronic clock.
17. Enter the security code into the radio receiver.
18. Start the engine and check the tightness of the connections.